Bicycle-brake.



No. 784,516. PATENTED MAR. 7, 1905. J. GHAMBLISS.

BICYCLE BRAKE.

APPLICATION FILED NOV. 18,1903.

UNITED STATES Patented March '7, 1905.

PATENT OEEIcE.

JEFF OHAMBLISS, OF JAOKSONS GAP, ALABAMA, ASSIGNOR OF ONE- FOURTH TO SOLYOUNG, OF ISLAND HOME, ALABAMA.

BICYCLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 784,516, dated March'7, 1905.

Application filed November 18, 1903- Serial NO- 181,708

To all whom, it may concern:

Be it known that I, JEFF OHAMBLISS, a citizen of the United States,residing at Jacksons (lap, in the county of Tallapoosa, State ofAlabama, have invented certain new and useful Improvements inBicycle-Brakes; and I do hereby declare the following to be a full,clear, and exactdescription of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to brakes for bicycles; and it has for its objectto provide a simple and cheap construction which may be easily andquickly attached to the seat-post tube of the ordinary bicycle at apoint just above the crank-hanger in position for ready operation by thefoot of the rider to throw it into engagement with the rear wheel of thebicycle.

A further object of the invention is to provide a brake which will beeffective in its operation and which will not jam the wheel when thrownthereagainst with maximum force, other objects'and advantages of theinvention being apparent from the following description.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in both views, Figure1 is a side elevation showing a bicycle equipped with the present brake.Fig. 2 is a transverse section'through the seat-post tube and showingthe brake mechanism in top plan.

Referring now to the drawings, there is shown a brake mechanismcomprising a collar 5, which is separable in form and is adapted to beclamped around the seat-post tube 6 of a bicycle-frame at a point justabove the crank-hanger, said collar having suitable clamping means forholding it in place and which when loosened permit of adjustment of thecollar to the proper point vertically of the tube. Upon the collar, atdiametrically opposite points thereof, are the ears 7 and 8, with whichare pivotally engaged the sides 9 and 10 of the brake-lever, thisbrake-lever consisting of a metal plate which is bent upon itself toform the said sides and the connecting web portion 11 at the front endof the lever, the upper edges of the sides adjacent to the web portionbeing serrated to prevent slipping of the foot ofthe operator when it isplaced upon the lever to operate the brake. The sides 9 and 10 extendrcarwardly beyond the tube 6, and the rear ends thereof are perforatedto receive the axle 12, on which is mounted the rubber brake-roller 13,so disposed that when the outer or forward end of the lever is depressedsaid roller will be swung into engagement with the tire of the rearwheel 14 of the bicycle at a point below the fulcrum of the lever, saidlever being areshaped, as illustrated, to insure this operation. One endof the axle of the brake-roller has a head 15, and the other end isthreaded to receive a nut 16, so that the axle is held in en'- gagementwith the sides of the lever, the head and nut of the axle acting to holdthe sides of the lever in engagement with the ears or trunnions upon thecollar.

With this construction it will be seen that the front end of the levermay be depressed to throw the brake-wheel against the tireof the rearwheel of the bicycle with the proper force, while the rotatable mountingof the engaging portion of the brake insures against any evil results ofexcessive pressure upon the brake, the brake being returned to itsnormal position when released by means of the helical springs 18, whichare mounted upon the ears or trunnions of the collar and have their endsconnected tothe sides of the lever and the tube 6.

\Vhat is claimed is- As an article of manufacture, a bicyclebrakecomprising a clamping-collar having trunnions at diametrically oppositepoints thereof, a lever formed from a metallic plate bent to formparallel spaced members and a connecting-bight,said members'being bentlongitudinally into arc shape and having alining perforations at theircenters and other alining perforations adjacent to their free ends, saidmembers being disposed with the trunnions pivotally engaged with thefirst-mentioned perforations, a bolt engaged in the secondnamedperforations of the members to hold said members in engagement with thetrunnions, a roller revolubly mounted upon the bolt, and a springconnected to the trunnions In testimony whereof Iaflix my signature inand bearing against the spaced members at presence of two witnesses. itsfree ends and having a yoke arranged for JEFF CHAMBLISS engagement withthe central upright of a bi- 5 cycle with which the collar is engaged toI Witnesses:

hold the roller yieldably out of engagemen SOL YOUNG, with the rearWheel of the bicycle. ALLEN GHAMBLIss;

